1
KCET 2024
MCQ (Single Correct Answer)
+1
-0

The ratio of volume of $\mathrm{Al}^{27}$ nucleus to its surface area is (Given, $R_0=1.2 \times 10^{-15} \mathrm{~m}$)

A
$2.1 \times 10^{-15} \mathrm{~m}$
B
$1.3 \times 10^{-15} \mathrm{~m}$
C
$0.22 \times 10^{-15} \mathrm{~m}$
D
$1.2 \times 10^{-15} \mathrm{~m}$
2
KCET 2024
MCQ (Single Correct Answer)
+1
-0

Consider the nuclear fission reaction ${ }_0^1 n+{ }_{92}^{235} \mathrm{U} \longrightarrow{ }_{56}^{144} \mathrm{Ba}+{ }_{36}^{89} \mathrm{Kr}+3{ }_0^1 n$. Assuming all the kinetic energy is carried away by the fast neutrons only and total binding energies of ${ }_{92}^{235} \mathrm{U},{ }_{56}^{144} \mathrm{Ba}$ and ${ }_{36}^{89} \mathrm{Kr}$ to be $1800 \mathrm{MeV}, 1200$ MeV and 780 MeV respectively, the average kinetic energy carried by each fast neutron is (in MeV)

A
200
B
180
C
67
D
60
3
KCET 2024
MCQ (Single Correct Answer)
+1
-0

The natural logarithm of the activity $R$ of a radioactive sample varies with time $t$ as shown. At $t=0$, there are $N_0$ undecayed nuclei. Then, $N_0$ is equal to [Take $e^2=7.5$ ]

KCET 2024 Physics - Atoms and Nuclei Question 1 English

A
7500
B
3500
C
75000
D
150000
4
KCET 2023
MCQ (Single Correct Answer)
+1
-0

In the Rutherford's alpha scattering experiment, as the impact parameter increases, the scattering angle of the alpha particle

A
remains the same
B
is always $$90^{\circ}$$
C
decreases
D
increases
KCET Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12